Study of concentric, eccentric and split type magnetic membrane micro-mixers
Electromagnetically driven elastic magnetic microfluidic mixers were investigated for their performance in air, water and glycerol filled chambers. They were fabricated by embedding flexible magnets in polydimethylsiloxane (PDMS) membrane. At a driving frequency of 100 Hz, oscillating fluid flow was...
| Main Authors: | , , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2018
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/85570 http://hdl.handle.net/10220/45193 |
| _version_ | 1811696639360892928 |
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| author | Li, Holden King Ho Tang, Shao Qiang Yeo, Ze Ting Chan, Wei Xuan Tan, Say Hwa Yoon, Yong-Jin Ng, Sum Huan |
| author2 | School of Mechanical and Aerospace Engineering |
| author_facet | School of Mechanical and Aerospace Engineering Li, Holden King Ho Tang, Shao Qiang Yeo, Ze Ting Chan, Wei Xuan Tan, Say Hwa Yoon, Yong-Jin Ng, Sum Huan |
| author_sort | Li, Holden King Ho |
| collection | NTU |
| description | Electromagnetically driven elastic magnetic microfluidic mixers were investigated for their performance in air, water and glycerol filled chambers. They were fabricated by embedding flexible magnets in polydimethylsiloxane (PDMS) membrane. At a driving frequency of 100 Hz, oscillating fluid flow was induced and mixing was achieved. Three designs were fabricated and studied: a) concentric type with the magnetic material in the center of the membrane, b) eccentric type with the magnetic material offset from the center of the membrane and c) split type with two regions of magnetic materials with opposing polarities. The split configuration provides additional fluid folding, facilitating mixing of the 20 μL fluorescent dye in 60 μL of solvent. Simulation and experimental results show that the eccentric and split designs were able to achieve a 20–30% reduction in mixing time compared to the concentric design. At the same magnetic flux density, the eccentric type design exhibited the greatest deflection, explaining the better mixing achieved over the concentric type design. The split type design, having the lowest deflection, was able to perform better and more consistently than the eccentric type design by creating a “micro rocker mixer” effect. We postulated that the shapes of the deflection profiles in the eccentric and split designs contributed to the mixing efficiency by promoting better chaotic advection than the concentric design. |
| first_indexed | 2024-10-01T07:42:34Z |
| format | Journal Article |
| id | ntu-10356/85570 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T07:42:34Z |
| publishDate | 2018 |
| record_format | dspace |
| spelling | ntu-10356/855702023-03-04T17:15:22Z Study of concentric, eccentric and split type magnetic membrane micro-mixers Li, Holden King Ho Tang, Shao Qiang Yeo, Ze Ting Chan, Wei Xuan Tan, Say Hwa Yoon, Yong-Jin Ng, Sum Huan School of Mechanical and Aerospace Engineering Magnetic Membrane Micro-mixers Electromagnetically driven elastic magnetic microfluidic mixers were investigated for their performance in air, water and glycerol filled chambers. They were fabricated by embedding flexible magnets in polydimethylsiloxane (PDMS) membrane. At a driving frequency of 100 Hz, oscillating fluid flow was induced and mixing was achieved. Three designs were fabricated and studied: a) concentric type with the magnetic material in the center of the membrane, b) eccentric type with the magnetic material offset from the center of the membrane and c) split type with two regions of magnetic materials with opposing polarities. The split configuration provides additional fluid folding, facilitating mixing of the 20 μL fluorescent dye in 60 μL of solvent. Simulation and experimental results show that the eccentric and split designs were able to achieve a 20–30% reduction in mixing time compared to the concentric design. At the same magnetic flux density, the eccentric type design exhibited the greatest deflection, explaining the better mixing achieved over the concentric type design. The split type design, having the lowest deflection, was able to perform better and more consistently than the eccentric type design by creating a “micro rocker mixer” effect. We postulated that the shapes of the deflection profiles in the eccentric and split designs contributed to the mixing efficiency by promoting better chaotic advection than the concentric design. ASTAR (Agency for Sci., Tech. and Research, S’pore) MOE (Min. of Education, S’pore) Published version 2018-07-23T08:44:27Z 2019-12-06T16:06:14Z 2018-07-23T08:44:27Z 2019-12-06T16:06:14Z 2018 Journal Article Tang, S. Q., Li, H. K. H., Yeo, Z. T., Chan, W. X., Tan, S. H., Yoon, Y.-J., et al. (2018). Study of concentric, eccentric and split type magnetic membrane micro-mixers. Sensing and Bio-Sensing Research, 19, 14-23. 2214-1804 https://hdl.handle.net/10356/85570 http://hdl.handle.net/10220/45193 10.1016/j.sbsr.2018.04.001 en Sensing and Bio-Sensing Research © 2018 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/BY-NC-ND/4.0/). 10 p. application/pdf |
| spellingShingle | Magnetic Membrane Micro-mixers Li, Holden King Ho Tang, Shao Qiang Yeo, Ze Ting Chan, Wei Xuan Tan, Say Hwa Yoon, Yong-Jin Ng, Sum Huan Study of concentric, eccentric and split type magnetic membrane micro-mixers |
| title | Study of concentric, eccentric and split type magnetic membrane micro-mixers |
| title_full | Study of concentric, eccentric and split type magnetic membrane micro-mixers |
| title_fullStr | Study of concentric, eccentric and split type magnetic membrane micro-mixers |
| title_full_unstemmed | Study of concentric, eccentric and split type magnetic membrane micro-mixers |
| title_short | Study of concentric, eccentric and split type magnetic membrane micro-mixers |
| title_sort | study of concentric eccentric and split type magnetic membrane micro mixers |
| topic | Magnetic Membrane Micro-mixers |
| url | https://hdl.handle.net/10356/85570 http://hdl.handle.net/10220/45193 |
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